中国舰船研究
中國艦船研究
중국함선연구
CHINESE JOURNAL OF SHIP RESEARCH
2014年
4期
30-35
,共6页
LNG船%C型独立液舱%内部压力%三维计算%船舶运动
LNG船%C型獨立液艙%內部壓力%三維計算%船舶運動
LNG선%C형독립액창%내부압력%삼유계산%선박운동
LNG carrier%Type C independent tank%internal pressure%three-dimensional calculation%ship motion
根据IMO《国际散装运输液化气体船舶构造与设备规则》及相关的压力容器标准GB 150.3-2011，提出一种针对小型LNG船C型独立液舱内部压力的三维计算方法，并借助AutoCAD的建模与计算功能，利用VBA进行二次开发，用程序实现内部压力及板厚的三维计算。针对某多用途小型LNG船的C型独立液舱，分别采用三维计算方法与传统的二维计算方法进行计算并比较结果差异，同时分析由船舶运动引起的加速度对计算结果的影响。结果显示：采用三维计算方法所得结果更准确，在精确设计时有必要按照三维计算方法进行计算；在工程实际中，针对设计蒸气压力通常大于0.3 MPa的单圆筒C型独立液舱的内部压力计算，可以采用传统的二维方法；由船舶运动引起的加速度对计算结果的影响不可忽略；对于设计蒸气压力较小的其它形式液舱的内部压力计算，应采用三维计算方法。
根據IMO《國際散裝運輸液化氣體船舶構造與設備規則》及相關的壓力容器標準GB 150.3-2011，提齣一種針對小型LNG船C型獨立液艙內部壓力的三維計算方法，併藉助AutoCAD的建模與計算功能，利用VBA進行二次開髮，用程序實現內部壓力及闆厚的三維計算。針對某多用途小型LNG船的C型獨立液艙，分彆採用三維計算方法與傳統的二維計算方法進行計算併比較結果差異，同時分析由船舶運動引起的加速度對計算結果的影響。結果顯示：採用三維計算方法所得結果更準確，在精確設計時有必要按照三維計算方法進行計算；在工程實際中，針對設計蒸氣壓力通常大于0.3 MPa的單圓筒C型獨立液艙的內部壓力計算，可以採用傳統的二維方法；由船舶運動引起的加速度對計算結果的影響不可忽略；對于設計蒸氣壓力較小的其它形式液艙的內部壓力計算，應採用三維計算方法。
근거IMO《국제산장운수액화기체선박구조여설비규칙》급상관적압력용기표준GB 150.3-2011，제출일충침대소형LNG선C형독립액창내부압력적삼유계산방법，병차조AutoCAD적건모여계산공능，이용VBA진행이차개발，용정서실현내부압력급판후적삼유계산。침대모다용도소형LNG선적C형독립액창，분별채용삼유계산방법여전통적이유계산방법진행계산병비교결과차이，동시분석유선박운동인기적가속도대계산결과적영향。결과현시：채용삼유계산방법소득결과경준학，재정학설계시유필요안조삼유계산방법진행계산；재공정실제중，침대설계증기압력통상대우0.3 MPa적단원통C형독립액창적내부압력계산，가이채용전통적이유방법；유선박운동인기적가속도대계산결과적영향불가홀략；대우설계증기압력교소적기타형식액창적내부압력계산，응채용삼유계산방법。
According to IMO“International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk”and the relevant regulations for pressure containers,“GB150.3-2011”, a 3-di-mensional method for the calculation of internal pressure of Type C independent tanks of miniature LNG carrier is given in this paper. With the assistance of the modeling and calculating function of AutoCAD, the VBA secondary development is used to achieve the 3-dimensional calculational of the internal pressure and thickness of plates. Also, the internal pressure of a Type C independent tank is calculated with both the 3-dimensional method and traditional 2-dimensional method separately, and the obtained results are com-pared carefully. Meanwhile, the influence of the acceleration caused by ship motion on the results is ana-lyzed. It is shown that the 3-dimensional method yields more accurate results and it is preferable in the pre-cision design. However, in real projects, the traditional 2-dimensional method is also applicable in the in-ternal pressure calculation of single-cylinder Type C independent tanks of a design steam pressure over 0.3 MPa in general, and the influence of the acceleration caused by ship motion cannot be ignored. The 3-dimensional method should be taken for the internal pressure calculation in the tanks of other types in lower design steam pressure.
